Why is it difficult to develop drugs that effectively kill viruses without harming body tissues?

Developing drugs that kill viruses is challenging because viruses replicate inside human cells, making it hard to target the virus without also damaging the host cells. Additionally, viruses have a simple structure compared to bacteria, which complicates the identification of specific targets for drug action.

This answer is strong because it addresses the core reasons behind the difficulty in developing antiviral drugs, including the relationship between viruses and host cells. The question tests the student's understanding of the complexities involved in drug development against viral pathogens.